| 摘要: |
| 利用有效场理论研究了双模随机交错晶场中混合自旋Blume-Capel模型纳米管系统的重入现象,发现了系统的重入现象与晶场取值概率、晶场强度和外壳层与内壳层格点间最近邻交换相互作用的关系。结果表明：取值概率、交换相互作用、晶场强度和温度等诸多因素相互竞争,使系统表现出丰富的磁化现象：正(负)晶场较弱时,系统只发生二级相变；随着正(负)晶场增强,系统的二级相变消失,呈现一级相变；一定条件下,系统会出现重入现象。 |
| 关键词: 重入现象 磁化强度 有效场理论 Blume-Capel模型 纳米管 |
| DOI： |
| 投稿时间：2019-10-13修订日期：2020-06-09 |
| 基金项目:齐鲁理工学院科技计划项目(QL19K060) |
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| The effect of the nearest neighbor weak exchange interaction on the reentrant phenomenon in the bimodal random interleaved crystal field |
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lixiaojie1, Wang miaomiao1, Li xin jun1, Liu Ping2, Chen wen long3
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| (1.Qilu Institute of Technology;2.Qilu Normal University;3.Linyi normal school) |
| Abstract: |
| The reentrant phenomenon of hybrid spin Blume-Capel nanotube system in a bimodal random staggered crystal field is studied by using the effective field theory. The results show that the system exhibits abundant magnetization due to the competition among various factors, such as value probability, exchange interaction, crystal field strength and temperature. With the enhancement of the positive (negative) crystal field, the second-order phase transition disappeared and the first-order phase transition appeared. Under certain conditions, the system will present the reentrant phenomenon. |
| Key words: reentrant phenomenon, magnetization, effective field theory, Blume-Capel model, nanotube |